feat: 类型帖互动、积分经济与发帖体验

补齐问答采纳/重开、投票匿名与有票禁编、悬赏过期退回、抽奖回帖开奖，并接入积分账本与发帖附件可见性。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/components/AvatarCropModal.tsx

@@ -315,7 +315,7 @@ export default function AvatarCropModal({
                           type="button"
                           onClick={() => handlePick(item)}
                           disabled={busy || active}
-                          title={
+                          data-tip={
                             active
                               ? "当前头像"
                               : item.kind === "image"
@@ -366,7 +366,7 @@ export default function AvatarCropModal({
                             }}
                             disabled={busy}
                             aria-label={confirming ? "再次点击确认删除" : "删除图片"}
-                            title={confirming ? "再次点击确认彻底删除" : "彻底删除"}
+                            data-tip={confirming ? "再次点击确认彻底删除" : "彻底删除"}
                             className="absolute -top-1.5 -right-1.5 w-5 h-5 rounded-full flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity disabled:opacity-50"
                             style={{
                               background: confirming ? "var(--red, #dc2626)" : "var(--panel)",